And US President George W Bush has told Iraq it will face "the severest consequences" if it does not comply with the new UN demands.

The chief weapons inspector, Hans Blix, has said his team will go to Baghdad on 18 November to resume their work, backed by the new, tougher, rules which say they can check any site, including Saddam Hussein's palaces.

The resolution was supported by all 15 Security Council members, including Syria - the only Arab representative - whose request for a delay in the vote had been rejected.

Zero tolerance

President Bush stressed that the vote simply gave the "outlaw regime" of Saddam Hussein one final chance to get rid of his illegal weapons - or the US and its allies would take it upon themselves to disarm Iraq.

Mr Bush - backed by Colin Powell - said Iraq could disarm or be disarmed

"His co-operation must be prompt and unconditional, or he will face the severest consequences."

Mr Bush said he would prefer Iraq to meet its obligations voluntarily, but he was "prepared for the alternative".

"In either case, the just demands of the world will be met," he said.

"Iraq can be certain the old game of cheat and retreat... will no longer be tolerated.

"The outcome of the current crisis is already determined. The full disarmament of weapons of mass destruction will occur. The only question for the Iraqi regime is to decide how."

UK Prime Minister Tony Blair echoed Mr Bush in a warning to the Iraqi leader: "Defy the UN's will and we will disarm you by force. Be in no doubt whatever over that."

Intense diplomacy

The adoption of the resolution came after eight weeks of intense negotiation, much of which focused on a French demand that war should not be the automatic result of a failure by Iraq to abide by the resolution.

Iraq had urged rejection of the new resolution

French President Jacques Chirac said the vote "offers Iraq a chance to disarm in peace".

"That was the meaning of France's initiative since the start," he said.

UN Secretary General Kofi Annan also urged Baghdad to seize the opportunity to disarm and "begin to end the isolation and suffering of the Iraqi people".

The resolution, which gives inspectors "immediate, unimpeded and unconditional" rights to search anywhere in the country for weapons of mass destruction, must be accepted or rejected by Iraq within seven days.

Though there is no requirement for a second resolution to authorise force, further action by the Security Council can only be triggered if the weapons inspectors complain that their work is being hindered.

Correspondents say the changes in earlier drafts were key to the unanimous support - particularly in securing the vote of Syria, which had been expected to abstain.

Syria had said the resolution set conditions Baghdad could never meet, but changed its mind after assurances from the US and Britain that it would not be used as a pretext to attack Iraq.

A BBC correspondent in Damascus says Iraq will probably be furious at the Syrian decision, which could put an end to the smuggling of cheap Iraqi oil through Syria.